CHEK2 and breast cancer: On the other hand, our results are in line with some previous findings showing that there was no association between CHEK2 1100delC mutation and risk for Breast Cancer (Zhang et al. 2008; Caligo et al. 2004; Osorio et al. 2004; Bellosillo et al. 2005; Rajkumar et al. 2003; Sodha et al. 2007; Gonzalez-Hormazabal et al. 2008) (Table 2).